what do you think about this???

[rabbito]

2nd hand manifold...but i dont know why its rusted.....you think its alright? how can i test if its alright? hit it with the hammer few times to check? should i get heat wrap and wrap around it??https://uploads.tapatalk-cdn.com/20171030/224d35477dd63e80822c153c5076ef4c.jpghttps://uploads.tapatalk-cdn.com/20171030/e802099e7b52f345d107cb6c34431333.jpg

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[SirDigby]

this is an intake?
evapo-rust!
https://www.youtube.com/watch?v=u03UtReREm0

[white89gt]

Digby, that would be an exhaust manifold.

By looking at it, I would guess it was bare steel that someone left out in the weather. I would use it, but take a wire wheel to the mating surfaces first. Looks like it is just surface rust to me.

[tmontague]

I thought at first a header and then I thought intake and settled on that